Nut-lock.



, PATENTBDJAN. 31, 1905, A.SGHM ID`T..A -fl NUT 1.00K.

'- APPLIo'ATxoN Hmm un. ze, 1904;.

4 Suomi/MIM v l im Samui.

K @a1/mias I UNITED STATES Patented January 31, 1905.v v

PATENT OFFICE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. |781,559, dated January31, 1905.

i Application filed March `26, 1904. Serial No. 200,178.

I To (1J/Z wtow t may concern:

Be it known that I, ALoIs SCHMIDT, a citi- Zen of the United States,residing at Covingwhich cooperates with the nut to so engage'.

the same that all likelihood of accidental displacement of the latter isobviated.

For a full description of the invention and the merits thereofand alsoto acquire aknowledge of the details of construction of the means foreffecting the result reference is to be had to the following-description and accompanying drawings.

While the essential and characteristic-features of the invention aresusceptible of modiiication, still the preferred embodiment oftheinvention is illustrated yin. the accompanying drawings, in whichWFigure 1 is a perspective view showing a fish-plate or like part havingan opening therethrough to receive a bolt,the die which is used to formthe grooves adjacent the peripheral portion of the opening in this partbeing shown in operative position. Fig. Q is a verticalsectional viewshowing a nut in locked position adjacent the coperating lock-washer.Fig. 3 isa bottom plan view of the lock-washer alone.

; Fig. L is a View in elevation to show more clearly the exactformationvof the depressions upon the attaching part which receive theyteeth of the lock-washer. Fig. 5 is a broken perspective viewvofthelock-washer, bringing out clearly the'form of the teeth thereof.

Corresponding and like `parts are referred to in the followingdescription and indicated in all the views of the drawings by the samThe invention as illustrated is shown in its adaptation in connectionwith a rail -joint structure,.though it will be understood, however,that the same may be used in connection plate 1.

`with vany parts securedv by-means of bolts and nuts.

In the drawings the numeral 1 designates the adjacent fish-plate of thejoint, against which the nut 2 is adapted to screw. The

fish-plate 1 is provided with an opening?, as

shown, through which passes the bolt 4, the latter being of any ordinarytype which is now in common use. The lock-washer 5. by which the nut 2is held fromdisplacement, is interposed between the nut and thefish-platel, or

whatever the part may be, through which the.

bolt passes; and this washer is provided: with a iiexible tongue 6,integrally formedtherewith and adapted to be bent' angularly from theplane of the washer into engagement with Ja side of the nut. In thespecific means by which the washer 5 is rigidly positioned is found theimportant feature of my invention. This means consists of a plurality ofpeculiarly-shaped teeth 7, disposed upon the under yside of the washer5and projected therefrom at the peripheral portion of the openingtherein. rlhe teeth 7 are of approximately triangular forrn incross-section and projected .radially from the opening of the washer,'as

before premised. The larger ends of the teeth 7 are adjacent the openingof the washer-plate, forreasons which will appear more fully as Y thedescription proceeds.

To more fully establish the interlocking connection between thewasher-plate and the adjacent fishplate l, between which and the nut 2said llock-washer is clamped, a tool is utilized' v'to formdepressions 8in the fish-plate adjacent the peripheral portion of the opening 2l ofthis member. The depressions 8 are formed by means of a tool 9, providedwith a conical iiuted die 10.' The fluted portions of the die l0 are ofa form somewhat corresponding tothe triangularly-shaped teeth 7 of therlock-washer 5, and when this' die is partially inserted into theopening 2a ofthe {ish-plate 1 a slight blow upon the tool will therebyform a plurality of depressions in the peripheral portion of thisopening adjacent the outer side of the fish- These depressions 8 arethose which receive the teeth 7 and which, interlocking with theseteeth, firmly prevent-rotation of the lock-washer 5, and this latterelement 5 IOO being thus positioned the engaging tongue 6 thereof isthereby adapted to prevent unserewing movement of the nut 2.

The bolt 4 having been passed through the attaching parts, thelock-washer 5 is slipped Over the threaded end portion thereof againstthe iish-plate. The nut 2 is then screwed against the lock-washer, andthe teeth 7 of the latter are forced into the depressions 8 adjacent thefish-plate opening. The disposition of the teeth 7 and their exact formis especially advantageous in that these teeth not only firmly positionthe washer by a wedge action against the fish-plate, but said teeth areequally spaced apart and entirely surround the openings of the washer,so as to admit of a nicety of adjustment of the same to allow theextension 6 to be turned upwardly against the nut at any point in apreferred disposition of the washer. The teeth 7 thus perform a dualfunction in that they lock the washer and serve to cause portions of thefish-plate to frictionally bite against the bolt. After the nut 2 hasbeen screwed hard against the washer 5 the tongue 6 is bent upwardlyagainst the side of the nut, and the latter is thus rigidly locked frommovement.

Having thus described the invention, what is claimed as new is- Incombination with a {ish-plate or like part provided with an openingtherethrough, depressions formed upon the outer side of the fish-plateand surrounding the peripheral portion of the opening therein` a boltpassed through the opening in the {ish-plate, a lockwasher disposed uponthe bolt and haring a flat unbroken outer side, triangularly-shapedsolid wedge-teeth projected from the under side of the lock-washer atthe peripheral portion of the opening in said washer, said teeth beingequally spaced apart and extending ra- -dially from the said openingentirely surrounding the same and being received in the depressions ofthe {ish-plate, a nut screwed upon the end of the bolt and hard againstthe outer fiat side of the lock-washer, and an integral tongue extendedfrom the washer into engagement with the nut.

In testimony whereofl l aix my signature in presence of two witnesses.

ALOIS SCHMIDT. lL. sfr] Titnessesz JNO. Gr. MniNnas,

AL. lV. TIMMERDING.

